Allergic to cat litter?

This forum is for cat lovers seeking everyday advice and suggestions on health-related issues. Remember, however, that advice on a public forum simply can't be a substitute for proper medical attention. Only your vet can say assuredly what is best for your cat.

I think my cats are allergic to their cat litter. Anyone have this problem?
I posted here before about Mr Grey's allergies and EGC issues. Well he was doing better lately on the Atopica, no more rodent ulcers and his feet sores had healed.
Then recently I ran out of the litter I was using (Purr and Simple brand) and they didn't have any at the store, so I used an old bag of litter I had from before. It was Nature's Miracle newspaper litter. Well soon after I switched over, Mr Grey started licking his back feet raw again, and then he developed a raw spot between his toes on one foot and the other foot became swollen. His lips were also starting to look red which usually happens before the rodent ulcers.
His brother Spot also had developed some sore spots on his paw pad and on his stomach. Something similar had happened to them before and now that I think about it, last time that happened was when they had been using the Nature's Miracle and a crystal type litter...
I took them in to the vet and she gave me antibiotics and did therapeutic laser on their paws and Spot's stomach. My vet said the most likely culprit is whatever they are using for the "natural fresh scent" in the litter.
I am trying to avoid any litter with corn, wheat, or soy because of Mr Grey's food allergies and I figured pine based litter is more likely to be irritating, so there's not a lot of choices left. I tried Yesterdays News clumping type before but I found it really difficult to clean because the pellets basically disintegrate when they get wet.
Luckily I was able to get more of the Purr and Simple litter instead. It isn't great, but at least they don't seem to be allergic to it!
Most of my boxes are Tidy Cat Breeze boxes but the cats strongly prefer to have one with actually litter rather than the Breeze pellets...

It's expensive at a lot of places but there are some where it's a lot cheaper. Let me see if I can find some for you. I just happened to see it today at my local holistic pet shop and I was pretty surprised. They were selling it for $8 a bag which is half the price of what I've seen online, even less than that in some cases. I bought 2 bags but I haven't had a chance to change their litter yet.

It's very possible. BK is allergic to the wheat litter. I had brought it in for a foster once and BK had an immediate reaction. We don't have any trouble with the World's Best (corn) but if I were you I would probably stay away from any food based litter to be sure. Also, stay away from anything scented.

Watson, you may have missed my post above but the litter does not have to be ingested to cause a reaction. Some of us have environmental allergies in addition to food ones and these litters make us itch and scratch.